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QRS axis: Difference between revisions
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The QRS in lead I, will have a negative deflection in a right axis deviation. The vector is not directed towards the electrode. However, lead AVF will be positive, the vector is directed towards the electrode. | The QRS in lead I, will have a negative deflection in a right axis deviation. The vector is not directed towards the electrode. However, lead AVF will be positive, the vector is directed towards the electrode. | ||
;Iso-electrical | |||
:When the depolarization is perpendicular on the lead, this is called '''iso-electrical'''. The QRS is neither positive nor negative. | |||
;Undetermined axis | |||
:When all extremity leads are biphasic, the axis is directed to the front or back, in a transverse plane. The axis is than '''undetermined'''. | |||
When all extremity leads are biphasic, the axis is directed to the front or back, in a transverse plane. The axis is than '''undetermined'''. | |||
==Abnormal heartaxis== | ==Abnormal heartaxis== | ||